Oops... reconnecting...
Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 810, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/threading.py", line 763, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 2630, in _thread_main
    self.loop_forever(retry_first_connection=True)
  File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 1410, in loop_forever
    rc = self.loop(timeout, max_packets)
  File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 926, in loop
    rc = self.loop_read(max_packets)
  File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 1209, in loop_read
    rc = self._packet_read()
  File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 1802, in _packet_read
    rc = self._packet_handle()
  File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 2278, in _packet_handle
    return self._handle_publish()
  File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 2464, in _handle_publish
    self._handle_on_message(message)
  File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 2624, in _handle_on_message
    self.on_message(self, self._userdata, message)
  File "./roowifi-mqtt-gw.py", line 87, in on_message
    roomba_state()
  File "./roowifi-mqtt-gw.py", line 39, in roomba_state
    s.send(chr(142))
AttributeError: 'NoneType' object has no attribute 'send'